title: MR imaging assessment of juxta cortical edema in osteoid osteoma in 28 patients.
abstract: Osteoid osteoma (OO) is a benign skeletal neoplasm. Twenty-eight patients with proven OO were studied with MRI regarding soft tissue involvement which was diagnosed when high proton-density and T2-weighted signal intensity and low signal intensity on T1-weighted images were found close to bone. Most tumors were located in the femur and tibia; 6 cases diaphyseal, 12 metaphyso-diaphyseal, and 10 epiphyseal. In relation to the cortex, 15 were located centrally or in its outer margin. Soft tissue involvement was found in 15 patients (53.6 %). A statistical relationship was found between soft tissue involvement and the tumor's location with regard to the cortex, being more frequent in peripherally located tumors. Therefore, soft tissue involvement is a frequent finding in peripherally located OO.
authors.affiliation: Department of Radiology, Hospital Dr. Peset, E-46 017 Valencia, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Nogués
authors.forename: L
authors.initials: L
authors.lastname: Martí-Bonmatí
authors.forename: F
authors.initials: F
authors.lastname: Aparisi
authors.forename: M C
authors.initials: MC
authors.lastname: Saborido
authors.forename: J
authors.initials: J
authors.lastname: Garci
authors.forename: R
authors.initials: R
authors.lastname: Dosdá
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology; D001842:Bone and Bones / Q000473:pathology*; D002648:Child; D004487:Edema / Q000150:complications / Q000175:diagnosis; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010017:Osteoma, Osteoid / Q000175:diagnosis* / Q000473:pathology; D012189:Retrospective Studies